Parr Instrument Series 5100 - Manual (Page 8)

P a r r I n s t r u m e n t C o m p a n y
5100 Low Pressure Reactors
8
Secure the clamp on the motor cord with
the provided screw next to the motor
socket for safety purposes.
6. Connect the thermocouple extension wire to
both the thermocouple and to the controller in
the “Primary Temp Input” position on the rear
panel. Insert the thermocouple into thermowell.
7. Connect leads from accessory packages such as
tachometer, pressure transducer and high temp
cut-off to the designated positions on the back
panel of the 4848 Controller.
8. Connect cooling water to internal cooling coil if
installed.
9. Connect cooling water to the magnetic stirrer.
See Instruction Manual 234M.
10. Connect tubing to the rupture disc outlet and run
to a safely vented area. See Instruction Manual
231M.
11. Note the voltage requirement on the controller
identification label on the back panel, and then
plug the power cord into an appropriate outlet.
Power for these reactors should be drawn from
a 3-slot, grounded outlet capable of carrying up
to the full current rating of the system.
12. Using the switch on the Reactor Controller, turn
on the motor for a short run to check the stirrer
drive system.
This apparatus includes a safety shield
which should be used at all times. A relief
valve pre-set to either 145 psi (CE certified)
or 150 psi is also provided as a safety
precaution to prevent over-pressurizing
the glass cylinder - this also should be
used at all times. Should this relief valve
be inadvertently removed, the glass vessel
could be over-pressurized, resulting in
an explosion. The safety shield has been
designed to withstand the force of this
explosion. However, in the event of an
explosion, some glass fragments will
exhaust through the vertical slots provided in
the back of the shield for the hoses.
Assembling and Connecting the Circulator
Jacket Hoses
CAUTION! If a jacketed vessel is being used,
the compression fittings should be pre-
assembled onto the insulated hoses before
attaching them to the cylinder. Failure to
do so or tightening any of the compression
fittings while the hoses are attached to the
cylinder will likely cause the jacket nipple
to break off.
Once the hoses are fixed at one end, they tend to
have a preferred orientation. The following hose
assembly procedure will minimize any side loading
by the hoses against the jacket connection nipples.
Attach the hoses to the circulating bath first and
route them through the openings at the rear of
the reactor stand. Note that lower left connection
is the jacket inlet. This should be connected to the
circulator pump discharge. Elbows are used on the
cylinder end to route the insulated hoses down and
then out the rear of the stand. With the hose in its
free state and not being twisted or rotated, tighten
the elbows to the hoses in a manner that orients the
open end of the elbow in line with the jacket nipple.
This minimizes any side loading of the hose against
the nipple.
Slide the brown plastic nut onto the nipple adapter
so that the flange with the O-ring groove is recessed
inside the nut. Tighten the tube stub onto the elbow.
Place the O-ring in the groove of each of the as-
sembled adapters and then screw the hose adapter
onto the jacket nipple. Tighten firmly, by hand only!
No pliers!
Draining the Jacket
To drain the jacket, first lower the temperature of the
jacket circulating fluid to 60 °C or less.
Note: Oil, used as the circulating fluid,
drains much faster when it is hot.
Turn off the circulator and loosen the hose connec-
tion at the top of the jacket. This will allow air to
enter the jacket and cause to fluid to drain back into
the circulator. When the draining is complete, both
hoses can be disconnected from the jacket. The ends
of the hoses should be supported at a level higher
than that of the circulator bath to prevent siphoning
and fluid loss.